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2b09def606
- better add reference to lvm dumpconfig --type default than stating that lvmetad is not enabled by default - substitute #DEFAULT_PID_DIR# with concrete value
72 lines
2.3 KiB
Groff
72 lines
2.3 KiB
Groff
.TH LVMETAD 8 "LVM TOOLS #VERSION#" "Red Hat Inc" \" -*- nroff -*-
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.SH NAME
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lvmetad \- LVM metadata cache daemon
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.SH SYNOPSIS
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.B lvmetad
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.RB [ \-l
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.RI { all | wire | debug }]
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.RB [ \-p
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.IR pidfile_path ]
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.RB [ \-s
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.IR socket_path ]
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.RB [ \-f ]
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.RB [ \-h ]
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.RB [ \-V ]
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.RB [ \-? ]
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.SH DESCRIPTION
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lvmetad is a metadata caching daemon for LVM. The daemon receives notifications
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from udev rules (which must be installed for LVM to work correctly when lvmetad
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is in use). Through these notifications, lvmetad has an up-to-date and
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consistent image of the volume groups available in the system.
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lvmetad is used by LVM only if it is enabled in \fBlvm.conf\fP(5) by specifying the
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\fBglobal/use_lvmetad\fP setting. If this is not defined in the LVM configuration
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explicitly then default setting is used instead (see the output of
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\fBlvm dumpconfig --type default global/use_lvmetad\fP command).
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.SH OPTIONS
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To run the daemon in a test environment both the pidfile_path and the
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socket_path should be changed from the defaults.
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.TP
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.B \-f
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Don't fork, but run in the foreground.
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.TP
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.BR \-h ", " \-?
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Show help information.
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.TP
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.IR \fB\-l " {" all | wire | debug }
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Select the type of log messages to generate.
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Messages are logged by syslog.
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Additionally, when -f is given they are also sent to standard error.
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Since release 2.02.98, there are two classes of messages: wire and debug.
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Selecting 'all' supplies both and is equivalent to a comma-separated list
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-l wire,debug.
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Prior to release 2.02.98, repeating -d from 1 to 3 times, viz. -d, -dd, -ddd,
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increased the detail of messages.
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.TP
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.B \-p \fIpidfile_path
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Path to the pidfile. This overrides both the built-in default
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(#DEFAULT_PID_DIR#/lvmetad.pid) and the environment variable
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\fBLVM_LVMETAD_PIDFILE\fP. This file is used to prevent more
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than one instance of the daemon running simultaneously.
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.TP
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.B \-s \fIsocket_path
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Path to the socket file. This overrides both the built-in default
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(#DEFAULT_RUN_DIR#/lvmetad.socket) and the environment variable
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\fBLVM_LVMETAD_SOCKET\fP. To communicate successfully with lvmetad,
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all LVM2 processes should use the same socket path.
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.TP
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.B \-V
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Display the version of lvmetad daemon.
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.SH ENVIRONMENT VARIABLES
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.TP
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.B LVM_LVMETAD_PIDFILE
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Path for the pid file.
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.TP
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.B LVM_LVMETAD_SOCKET
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Path for the socket file.
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.SH SEE ALSO
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.BR lvm (8),
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.BR lvm.conf (5)
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